#include <stdarg.h>
#include <stdio.h>

// minprintf: minimal printf with variable argument list
void minprintf(char *fmt, ...)
{
	va_list ap;		// points to each unnamed arg in turn
	char *p, *sval;
	int ival;
	double dval;

	va_start(ap, fmt);	// make ap point to 1st unnamed arg
	for(p = fmt; *p; p++)
	{
		if(*p != '%')
		{
			putchar(*p);
			continue;
		}
		switch(*++p)
		{
		case 'd':
			ival = va_arg(ap, int);
			printf("%d", ival);
			break;
		case 'f':
			dval = va_arg(ap, double);
			printf("%f", dval);
			break;
		case 's':
			for(sval = va_arg(ap, char *); *sval; sval++)
				putchar(*sval);
			break;
		default:
			putchar(*p);
			break;
		}
	}
	va_end(ap);		// clean up when done
}

int main()
{
	minprintf("%d\n", 2);
	return 0;
}
